and l don't know why .l can‘t think what l did wrong .

and l don't know why .l can‘t think what l did wrong .
and l don't know why .l can‘t think what l did wrong .

and l don't know why .l can‘t think what l did wrong .
我不知道为什么.我想不出我做错了什么

并且我不知道原因。我想不出我到底做错了什么。